This Paper study the intersection and union operations, with it establishes the algebraic structure of equivalence relations.

本文主要研究了等价关系的交并运算，建立了等价关系对于交并运算的代数结构。

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Based on the distributed parallel computation environment that based on network, this paper study the parallel processing of XML.

因此，本文基于分布式网络并行环境研究了对XML文档的并行处理方法。

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This paper study the layer's strength and strain characters through experiments, and the obtained data can be a reference for the engineering design and the advanced research.

本文通过试验研究铁锰薄硬壳层强度与变形特性，并结合工程进行模拟研究，为下一步从事设计与研究提供参考。

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Susan Brink is a health reporter for The Los Angeles Times and she wrote about this new study for the paper, and welcome to the show.

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This study echoes a paper released in November by the U.S. Government Accountability Office, which found that customers end up paying higher prices for goods and services because the fees that a seller pays to Visa and MasterCard are built into the retail price.

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Leszczynski argued that the limitations of this study amounted to failure of the peer review system and called for the retraction of the paper and an investigation into why it was published in the first place.

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